TL;DR
This paper calculates the axion potential in antiferromagnetic insulators, classifies phases, and predicts dynamical axions with masses up to eV scale, providing insights into topological and magnetic order effects.
Contribution
It introduces a method to derive axion potential from the effective antiferromagnetic order parameter, predicting dynamical axions across phases.
Findings
Dynamical axions are predicted in all phases.
Axion masses vary up to the eV scale.
Classification of phases based on axion properties.
Abstract
We calculate axion potential in antiferromagnetic insulators from path integral. It is derived from the effective potential for the order parameter of the antiferromagnetic phase in insulators. Static and dynamical axions are defined consistently from the potential. Consequently antiferromagnetic/paramagnetic and topological/normal orders are classified. The dynamical axion is predicted in all phases and its mass turns out to be various values up to eV scale.
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